Ben Folds brought out Kesha last night, during the encore for his performance at L.A.'s Orpheum Theatre. The two were supposed to be performing together during this Sunday's Billboard Music Awards but Dr. Luke's label soon put a stop to that. They played Bob Dylan's 'It Ain't Me,' along with some of Folds' own songs like 'Still Fighting It' and 'Rock This Bitch.' Kesha then took to Instagram to thank Folds for the experience. Watch below.